error: unsatisfied lifetime constraints
  --> $DIR/borrowck-reborrow-from-shorter-lived-andmut.rs:19:5
   |
LL | fn copy_borrowed_ptr<'a,'b>(p: &'a mut S<'b>) -> S<'b> {
   |                      -- -- lifetime `'b` defined here
   |                      |
   |                      lifetime `'a` defined here
LL |     S { pointer: &mut *p.pointer }
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`

error: aborting due to previous error